Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Aug. 31, 2021
Debt Instrument [Line Items]
Long-term debt, non-current	$ 7,273,736	$ 7,030,756
Long-term debt, current	493,496	483,497
SEI | Convertible senior notes
Debt Instrument [Line Items]
Debt discount, net, non-current	(17,870)	(19,174)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(695)	(748)
Deferred financing costs, net, current	$ 0	$ 0
SEI | Convertible senior notes | 0.25% convertible senior notes
Debt Instrument [Line Items]
Stated interest rate	0.25%
Weighted average effective interest rate	0.71%	0.71%
Long-term debt, gross, non-current	$ 575,000	$ 575,000
Long-term debt, gross, current	$ 0	$ 0
SEI | Convertible senior notes | 2.625% convertible senior notes
Debt Instrument [Line Items]
Stated interest rate	2.625%
Weighted average effective interest rate	3.04%	3.03%
Long-term debt, gross, non-current	$ 600,000	$ 600,000
Long-term debt, gross, current	0	0
Sunnova Energy Corporation
Debt Instrument [Line Items]
Debt discount, net, non-current	(12,722)	(13,288)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(11,356)	(12,119)
Deferred financing costs, net, current	$ 0	$ 0
Sunnova Energy Corporation | Notes payable
Debt Instrument [Line Items]
Weighted average effective interest rate	19.38%	7.07%
Long-term debt, gross, non-current	$ 0	$ 0
Long-term debt, gross, current	$ 577	$ 3,084
Sunnova Energy Corporation | Senior notes | 5.875% senior notes
Debt Instrument [Line Items]
Stated interest rate	5.875%			5.875%
Weighted average effective interest rate	6.55%	6.53%
Long-term debt, gross, non-current	$ 400,000	$ 400,000
Long-term debt, gross, current	$ 0	$ 0
Sunnova Energy Corporation | Senior notes | 11.75% senior notes
Debt Instrument [Line Items]
Stated interest rate	11.75%		11.75%
Weighted average effective interest rate	12.29%	12.02%
Long-term debt, gross, non-current	$ 400,000	$ 400,000
Long-term debt, gross, current	0	0
EZOP | Revolving credit facility
Debt Instrument [Line Items]
Debt discount, net, non-current	(261)	(302)
Debt discount, net, current	$ 0	$ 0
EZOP | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Weighted average effective interest rate	9.47%	8.72%
Long-term debt, gross, non-current	$ 390,171	$ 511,000
Long-term debt, gross, current	0	0
HELII
Debt Instrument [Line Items]
Debt discount, net, non-current	(23)	(24)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(2,771)	(2,926)
Deferred financing costs, net, current	$ 0	$ 0
HELII | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	5.64%	5.64%
Long-term debt, gross, non-current	$ 190,508	$ 194,933
Long-term debt, gross, current	9,111	9,065
RAYSI
Debt Instrument [Line Items]
Debt discount, net, non-current	(696)	(753)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(2,888)	(3,004)
Deferred financing costs, net, current	$ 0	$ 0
RAYSI | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	5.58%	5.55%
Long-term debt, gross, non-current	$ 103,686	$ 105,096
Long-term debt, gross, current	6,450	6,349
HELIII
Debt Instrument [Line Items]
Debt discount, net, non-current	(1,180)	(1,250)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(1,133)	(1,200)
Deferred financing costs, net, current	$ 0	$ 0
HELIII | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	4.46%	4.43%
Long-term debt, gross, non-current	$ 84,477	$ 86,232
Long-term debt, gross, current	9,873	9,983
TEPH
Debt Instrument [Line Items]
Debt discount, net, non-current	(1,015)	(1,168)
Debt discount, net, current	$ 0	$ 0
TEPH | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Weighted average effective interest rate	9.80%	10.03%
Long-term debt, gross, non-current	$ 1,024,850	$ 1,036,600
Long-term debt, gross, current	0	0
SOLI
Debt Instrument [Line Items]
Debt discount, net, non-current	(71)	(74)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(5,511)	(5,769)
Deferred financing costs, net, current	$ 0	$ 0
SOLI | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	3.93%	3.91%
Long-term debt, gross, non-current	$ 332,368	$ 335,874
Long-term debt, gross, current	13,454	12,965
HELIV
Debt Instrument [Line Items]
Debt discount, net, non-current	(382)	(417)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(1,798)	(1,955)
Deferred financing costs, net, current	$ 0	$ 0
HELIV | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	4.16%	4.16%
Long-term debt, gross, non-current	$ 95,837	$ 97,458
Long-term debt, gross, current	$ 10,700	$ 10,854
AP8 | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Weighted average effective interest rate	9.18%	9.42%
Long-term debt, gross, non-current	$ 0	$ 0
Long-term debt, gross, current	215,000	215,000
SOLII
Debt Instrument [Line Items]
Debt discount, net, non-current	(54)	(56)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(3,790)	(3,948)
Deferred financing costs, net, current	$ 0	$ 0
SOLII | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	1.41%	3.90%
Long-term debt, gross, non-current	$ 219,974	$ 221,955
Long-term debt, gross, current	6,697	7,195
HELV
Debt Instrument [Line Items]
Debt discount, net, non-current	(504)	(540)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(1,956)	(2,094)
Deferred financing costs, net, current	$ 0	$ 0
HELV | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	2.51%	2.49%
Long-term debt, gross, non-current	$ 132,508	$ 134,473
Long-term debt, gross, current	13,286	13,496
SOLIII
Debt Instrument [Line Items]
Debt discount, net, non-current	(98)	(102)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(4,679)	(4,871)
Deferred financing costs, net, current	$ 0	$ 0
SOLIII | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	2.84%	2.81%
Long-term debt, gross, non-current	$ 253,438	$ 257,545
Long-term debt, gross, current	14,533	15,762
HELVI
Debt Instrument [Line Items]
Debt discount, net, non-current	(30)	(32)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(2,204)	(2,345)
Deferred financing costs, net, current	$ 0	$ 0
HELVI | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	2.10%	2.10%
Long-term debt, gross, non-current	$ 157,539	$ 159,901
Long-term debt, gross, current	13,313	13,521
HELVII
Debt Instrument [Line Items]
Debt discount, net, non-current	(29)	(31)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(1,697)	(1,797)
Deferred financing costs, net, current	$ 0	$ 0
HELVII | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	2.54%	2.53%
Long-term debt, gross, non-current	$ 122,132	$ 123,494
Long-term debt, gross, current	10,060	10,221
HELVIII
Debt Instrument [Line Items]
Debt discount, net, non-current	(4,130)	(4,355)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(3,220)	(3,395)
Deferred financing costs, net, current	$ 0	$ 0
HELVIII | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	3.64%	3.62%
Long-term debt, gross, non-current	$ 240,479	$ 243,020
Long-term debt, gross, current	19,681	19,995
SOLIV
Debt Instrument [Line Items]
Debt discount, net, non-current	(8,998)	(9,440)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(6,443)	(6,759)
Deferred financing costs, net, current	$ 0	$ 0
SOLIV | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	5.95%	5.90%
Long-term debt, gross, non-current	$ 322,526	$ 325,612
Long-term debt, gross, current	8,574	8,464
HELIX
Debt Instrument [Line Items]
Debt discount, net, non-current	(2,886)	(3,027)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(2,667)	(2,798)
Deferred financing costs, net, current	$ 0	$ 0
HELIX | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	5.67%	5.64%
Long-term debt, gross, non-current	$ 195,236	$ 196,174
Long-term debt, gross, current	13,592	15,246
HELX
Debt Instrument [Line Items]
Debt discount, net, non-current	(15,988)	(17,015)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(2,855)	(3,064)
Deferred financing costs, net, current	$ 0	$ 0
HELX | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	7.55%	7.38%
Long-term debt, gross, non-current	$ 202,073	$ 200,842
Long-term debt, gross, current	$ 14,644	$ 19,996
IS | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Weighted average effective interest rate	9.22%	8.90%
Long-term debt, gross, non-current	$ 34,100	$ 31,300
Long-term debt, gross, current	0	0
SOLV
Debt Instrument [Line Items]
Debt discount, net, non-current	(14,632)	(15,491)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(6,310)	(6,682)
Deferred financing costs, net, current	$ 0	$ 0
SOLV | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	6.82%	6.93%
Long-term debt, gross, non-current	$ 310,531	$ 312,844
Long-term debt, gross, current	7,890	7,775
HELXI
Debt Instrument [Line Items]
Debt discount, net, non-current	(11,557)	(12,007)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(4,891)	(5,195)
Deferred financing costs, net, current	$ 0	$ 0
HELXI | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	6.48%	6.29%
Long-term debt, gross, non-current	$ 245,454	$ 247,251
Long-term debt, gross, current	29,504	31,240
HELXII
Debt Instrument [Line Items]
Debt discount, net, non-current	(12,401)	(13,065)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(4,153)	(4,135)
Deferred financing costs, net, current	$ 0	$ 0
HELXII | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	6.98%	6.71%
Long-term debt, gross, non-current	$ 209,739	$ 210,263
Long-term debt, gross, current	25,375	26,661
AP9
Debt Instrument [Line Items]
Debt discount, net, non-current	(494)	(572)
Debt discount, net, current	$ 0	$ 0
AP9 | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Weighted average effective interest rate	18.73%	19.30%
Long-term debt, gross, non-current	$ 16,035	$ 12,118
Long-term debt, gross, current	0	0
HESI
Debt Instrument [Line Items]
Debt discount, net, non-current	(7,337)	(7,616)
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(6,740)	(7,058)
Deferred financing costs, net, current	$ 0	$ 0
HESI | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	4.04%	10.94%
Long-term debt, gross, non-current	$ 211,331	$ 213,432
Long-term debt, gross, current	26,988	26,625
SOLVI
Debt Instrument [Line Items]
Debt discount, net, non-current	(12,194)	0
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(5,091)	0
Deferred financing costs, net, current	$ 0	0
SOLVI | Solar asset-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	6.31%
Long-term debt, gross, non-current	$ 221,811	0
Long-term debt, gross, current	4,188	0
HELXIII
Debt Instrument [Line Items]
Debt discount, net, non-current	(7,412)	0
Debt discount, net, current	0	0
Deferred financing costs, net, non-current	(4,490)	0
Deferred financing costs, net, current	$ 0	0
HELXIII | Solar loan-backed notes
Debt Instrument [Line Items]
Weighted average effective interest rate	5.93%
Long-term debt, gross, non-current	$ 202,235	0
Long-term debt, gross, current	$ 20,006	$ 0